# def add(x,y):
#     result = x+y
#     # print(result)
# print(add(3,4))

# def add(x,y):
#     result = x+y
#     return result
#     print('return后面的不会执行')
#
# r = add(3,4)
# print(r)

# def add(x,y):
#     result = x+y
#     return result
# print(add(3,4))
